Peter D. St. Phillip

Peter D. St. Phillip

Partner/Head of Litigation

about Peter St. Phillip

Peter St. Phillip is the firm’s head of litigation and represents institutional clients in large-scale cost recovery litigation. Among his clients are major health insurers as well as hedge funds and other investment firms.

Practice Areas:

Antitrust litigation, securities litigation

Noteworthy Cases & Achievements:

Mr. St. Phillip has extensive appellate experience stemming from his clerkship with the United States Court of Appeals for the Third Circuit. He has lectured on appellate advocacy and routinely argues appeals in the federal circuit courts, including Aetna’s successful appeal in a landmark RICO decision that holds drug manufacturers accountable to health insurers for damages connected to marketing fraud.

He has prosecuted many antitrust and cost recovery matters and is known for defending expert economic testimony in prosecutions of commodity manipulation securities claims, prescription drug cases, and antitrust matters. He is responsible for day-to-day litigation efforts in several antitrust, pharmaceutical and healthcare cases, and is sought by clients for his extensive expertise in complex litigation over medical and pharmaceutical cost recovery claims and pharmacy benefits management.

He litigates antitrust issues related to collusive interbank rate-setting conduct in the financial industry. Other clients include hedge funds represented in insurance coverage and securities litigation and a publicly-traded bank that turns to Mr. St. Phillip for his knowledge of state and federal lending disclosure and trade practices laws.

Mr. St. Phillip serves on the Board of Visitors of Seton Hall University School of Law. He is a contributing editor to the American Bar Association’s Antitrust Class Actions Handbook, and often publishes and speaks on antitrust issues.


B.A. Trinity College (1990)

J.D. cum laude Seton Hall University School of Law (1993)

Bar/Court Admissions:

New York, New Jersey, Pennsylvania; the U.S. Supreme Court, U.S. Courts of Appeals for the 1st, 2nd, 3rd, 5th, 6th, 8th and 9th Circuits; the U.S. District Courts for the Southern and Eastern Districts of New York, the District of New Jersey, the Eastern District of Pennsylvania and the District of Connecticut